Exception Handling | 17/100 Days of Python Algo Trading

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Day 17: Exception Handling

1. What is a syntax error in programming?

A) An error in the logic that occurs at runtime.

B) An error that occurs when the code does not follow the language rules.

C) An error that is handled by try-except blocks.

D) An error that can be ignored during compilation.

2. Which of the following is an example of a syntax error?

A) Trying to access a non-existent file.

B) Forgetting a colon at the end of an if statement in Python.

C) Accessing a list index out of range.

D) Passing the wrong number of arguments to a function.

3. What are exceptions in Python?

A) Mistakes in the code that are ignored during the execution.

B) Errors detected during execution that are not unconditionally fatal.

C) Errors that cannot be handled.

D) Warnings that do not stop the execution of the program.

4. Which Python keyword is used to handle exceptions?

A) handle

B) error

C) try

D) fix

5. What type of errors does Python's exception handling mechanism not catch?

A) Runtime errors

B) Syntax errors

C) Logical errors

D) Both B and C

6. How would you catch and handle a FileNotFoundError in Python?

A) try: open('file.txt') except FileNotFoundError: print("File not found.")

B) error: open('file.txt') except FileNotFoundError: print("File not found.")

C) try: open('file.txt') handle FileNotFoundError: print("File not found.")

D) open('file.txt') except FileNotFoundError: print("File not found.")

7. Which exception is thrown when dividing by zero in Python?

A) ArithmeticError

B) ValueError

C) ZeroDivisionError

D) TypeError

8. What does the finally block do?

A) It finalizes the exceptions to prevent propagation.

B) It runs regardless of whether an exception was caught or not.

C) It finalizes variable values within the try block.

D) It is executed as the last block of the exception handling.

9. What will happen if an exception is not caught in a try block?

A) The exception will cause the program to end or crash.

B) The exception will be ignored.

C) The exception is automatically caught by the system.

D) The exception is logged in the background.

10. Which statement about exception handling is true?

A) Exception handling significantly slows down the execution of the program.

B) Exception handling is only necessary for high-level applications.

C) Exception handling can make the code easier to manage and more robust.

D) Exception handling in Python is optional and not recommended.

11. How do you explicitly raise an exception in Python?

A) raise Exception("Error message")

B) throw Exception("Error message")

C) error Exception("Error message")

D) except Exception("Error message")

12. What is the correct way to handle multiple exceptions in Python?

A) try: # code except (TypeError, ValueError): # error handling code

B) try: # code except TypeError or ValueError: # error handling code

C) try: # code handle TypeError, ValueError: # error handling code

D) try: # code error TypeError, ValueError: # error handling code

13. What is an AssertionError in Python?

A) An error thrown when an assert statement fails.

B) An error that confirms a function has run successfully.

C) An error related to incorrect Python syntax.

D) An error thrown when an expected exception does not occur.

14. Which keyword allows you to test for exceptions in your Python code?

A) test

B) try

C) with

D) assert

15. What is typically included in the except block?

A) The cleanup code that needs to run regardless of exceptions.

B) The code that executes if an error occurs in the try block.

C) Declarations of which exceptions to catch.

D) Commands to log every action taken in the try block.

16. What exception is raised by the assert statement?

A) ValueError

B) AssertionError

C) SyntaxError

D) RuntimeError

17. What is the best practice when defining custom exceptions in Python?

A) Extend the base Exception class.

B) Extend the base Error class.

C) Extend the RuntimeException class.

D) Define them as standalone functions.

18. How should critical operations such as file writing or network manipulation be handled to prevent program crashes?

A) Use nested exception blocks.

B) Surround them with a try block to catch potential exceptions.

C) They should not be handled; let the default handler deal with any issues.

D) Use the pass statement to ignore exceptions.

19. Why should you avoid catching the base Exception class in Python?

A) It will prevent other exceptions from being caught.

B) It is too general and can mask other exceptions.

C) It is computationally expensive.

D) It is deprecated in newer Python versions.

20. Which Python feature is specifically designed for cleanup actions?

A) The pass statement

B) The finally block

C) The continue statement

D) The else block on loops